Well, according to the game at the Cracker Barrel, most of the time I am 'Just Plain Dumb' with an occasional 'Purty Smart', BUT, if I had jumped to nitrogen, I would still check my tire pressure each ride and if it is low, I would top it off with air...since I have that readily available.
That was my thought process on the whole nitrogen thing from the start, so I never fooled with it.